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removing unused functions during final link
- From: Melvin Blades <melvin dot blades at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Wed, 27 Aug 2014 14:02:39 -0700
- Subject: removing unused functions during final link
- Authentication-results: sourceware.org; auth=none
I've inherited a pile of code and need to cross compile it for an
embedded MIPs processor
I'm creating a single app that will be run under Linux.
My app code links to another larger pile of third-party software (utilities)
My app uses only a part of the these utilities, but the final
executable is very large and includes utilities functions that are
never called.
My app also will dynamically link with uclibc
My compilation/linking results in an app so large that I can't load it
on my eval board.
What command line options can I use to get the linker to strip unused
functions from the final executable?
I've googled and came up with some proposed solutions
This one
https://gcc.gnu.org/ml/gcc-help/2003-08/msg00128.html
results in an error message .. -f may not be used without -shared
Other places say that the dead-strip option is architecture dependent.
http://embeddedfreak.wordpress.com/2009/02/10/removing-unused-functionsdead-codes-with-gccgnu-ld/
Where can I find out if the MIPS compiler supports this?
Or whether I just haven't used the correct command line options for
compiling and linking